ABSTRACT
A prediction method of fatigue strength was proposed for polymer composites and was confirmed for flexural fatigue strength of satin-woven CFRP laminates [8] and others. This method is based upon the four hypotheses: (A) same failure mechanisms, (B) same time-temperature superposition principle for all failure strengths, (C) linear cumulative damage law for monotone loading, and (D) linear dependence of fatigue strength upon stress ratio. Data are provided for tensile constant strain-rate, creep, and fatigue tests at various temperatures in the longitudinal direction of unidirectional CFRP. In this paper, experimental verification of the prediction method is discussed for the tensile fatigue strength of the unidirectional CFRP.
